ipq807x: 6.1: fix I/O WRITE_ZEROES errors on some eMMC devices

[openwrt/staging/jow.git] / target / linux / ipq807x / patches-6.1 / 0133-mmc-core-disable-TRIM-on-Kingston-EMMC04G-M627.patch

diff --git a/target/linux/ipq807x/patches-6.1/0133-mmc-core-disable-TRIM-on-Kingston-EMMC04G-M627.patch b/target/linux/ipq807x/patches-6.1/0133-mmc-core-disable-TRIM-on-Kingston-EMMC04G-M627.patch
new file mode 100644 (file)
index 0000000..ac7af52
--- /dev/null
+++ b/target/linux/ipq807x/patches-6.1/0133-mmc-core-disable-TRIM-on-Kingston-EMMC04G-M627.patch
@@ -0,0 +1,38 @@
+From 26c97b6fb7d291f55e0e4a410d266d1355118ed9 Mon Sep 17 00:00:00 2001
+From: Robert Marko <robimarko@gmail.com>
+Date: Wed, 31 May 2023 20:21:26 +0200
+Subject: [PATCH] mmc: core: disable TRIM on Kingston EMMC04G-M627
+
+It seems that Kingston EMMC04G-M627 despite advertising TRIM support does
+not work when the core is trying to use REQ_OP_WRITE_ZEROES.
+
+We are seeing I/O errors in OpenWrt under 6.1 on Zyxel NBG7815 that we did
+not previously have and tracked it down to REQ_OP_WRITE_ZEROES.
+
+Trying to use fstrim seems to also throw errors like:
+[93010.835112] I/O error, dev loop0, sector 16902 op 0x3:(DISCARD) flags 0x800 phys_seg 1 prio class 2
+
+Disabling TRIM makes the error go away, so lets add a quirk for this eMMC
+to disable TRIM.
+
+Signed-off-by: Robert Marko <robimarko@gmail.com>
+---
+ drivers/mmc/core/quirks.h | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+--- a/drivers/mmc/core/quirks.h
++++ b/drivers/mmc/core/quirks.h
+@@ -108,6 +108,13 @@ static const struct mmc_fixup __maybe_un
+                 MMC_QUIRK_TRIM_BROKEN),
+ 
+       /*
++       * Kingston EMMC04G-M627 advertises TRIM but it does not seems to
++       * support being used to offload WRITE_ZEROES.
++       */
++      MMC_FIXUP("M62704", CID_MANFID_KINGSTON, 0x0100, add_quirk_mmc,
++                MMC_QUIRK_TRIM_BROKEN),
++
++      /*
+        * Some SD cards reports discard support while they don't
+        */
+       MMC_FIXUP(CID_NAME_ANY, CID_MANFID_SANDISK_SD, 0x5344, add_quirk_sd,